The Development of Spectroscopy System for Non-Invasive Measurement of Skin Blood Oxygen Saturation

This paper presents the use of the developed spectroscopic system for noncontact measurement of one's skin blood oxygen saturation (S_tO₂). This study employed light diffusion model in the prediction of the required value using light source of wavelength 488 nm, 522 nm and 684 nm. The performance of this system was tested on ten volunteers of different skin tone to investigate the robustness of the system. The mean and standard deviation of S_tO₂ value calculated for the recruited subjects is given by 71 ± 4.7 %. The results revealed differences in the predicted value with the recruits' skin tone. This work concluded that the developed system may potentially be used in clinical settings to determine skin oxygen saturation and to monitor wound healing progress. (paper)